Se evalúa el rendimiento ex-dividendo en acciones colombianas entre 1999 y 2007, periodo que incluye la conformación en julio de 2001 de la Bolsa de Valores de Colombia, resultado de la integración de tres bolsas previamente existentes. Contrario a la hipótesis de eficiencia de mercado, se...

This paper examines the empirical behaviour of stock prices around the ex dates of stock splits in order to detect anomalous returns. Also, it is investigated the determinant factors of the split size, its effects on the liquidity and the influence of the market microstructure in the abnormal...

We study the ex-dividend return in the Colombian stock market between 1999 and 2007, period that includes the merger of the former three Colombian stock exchanges in the Bolsa de Valores de Colombia in July 2001. Contrary to the Efficient Market Hypothesis, we found positive and statistically...

Under what circumstances is it necessary or convenient for an agent to rely on habits and rules? This paper focuses on the types of decision situation giving rise to their use. Even optimisation requires the development of rules, and for this reason mainstream economics cannot legitimately...

Because of the importance of the energy sector's development for the performance and stability of the economy, its analysis has become an intriguing branch of the economic sciences. For this study it should be tested the characteristics of each of the industries that comprise it, as well as make...

Because of the importance of the energy sector's development for the performance and stability of the economy, its analysis has become an intriguing branch of the economic sciences. For this study it should be tested the characteristics of each of the industries that comprise it, as well as make...

En 1970, E. Fama publicó un artículo sobre la teoría de los mercadosde capitales eficientes" que tuvo -y aún tiene- un impacto muy fuerteen finanzas. El artículo muestra que la teoría presentada por Fama notiene nada que ver con la eficiencia tal como la entienden los economistas.En...

In this paper the behavior of a tax-collecting government (a tax office) when imposing a quantity-tax to firms is analyzed along a two-period signaling model. Each taxpayer privately knows its technological attributes, while third parties—the tax office among them—have only a prior belief...

This paper tests Bester's (1985, 1987) prediction about the separating role ofcontracts that involve both interest rates and collateral in credit markets. To test thisprediction we use data from natural credit markets and controlled experiments. Using asample of credits to small and medium size...